Currently, the facility can produce up to six million gallons per day of highly purified recycled water that is very similar or better than fresh water. The water is injected into the Dominguez Gap Barrier (DGB) to protect groundwater reservoirs from seawater intrusion. This recycled water replaces the use of potable water.

TIWRP is undergoing the AWPF Ultimate Expansion Project; this project aims to double the capacity of the AWPF, doubling the amount of water purified by the end of 2016.

This project is located at the Ken Malloy Harbor Regional Park in the Harbor City and Wilmington communities of Los Angeles. The park is approximately 290 acres and contains the 45-acre Machado Lake. The primary goal of the project is to improve the water quality in Machado Lake, maintaining TMDL compliance, while enhancing the surrounding natural habitat and the recreational features of the park. Highly treated recycled water from Terminal Island's Advanced Water Purification Facility will be used as makeup for lake evaporation, eliminating the use of potable water for this purpose.

The Department of Public Works will construct a new 54-inch diameter force main sewer line. The new force main will operate as a parallel system in conjunction with the existing 48-inch force main. The new force main is needed to avert a potential sewage spill that could occur from an overflow or failure of the existing 54-year-old force main. The project objectives are to increase sewage capacity, create pipeline redundancy and allow for maintenance of the system.